Bump zope-interface from 7.1.0 to 7.1.1

Bumps [zope-interface](https://github.com/zopefoundation/zope.interface) from 7.1.0 to 7.1.1.
- [Changelog](https://github.com/zopefoundation/zope.interface/blob/master/CHANGES.rst)
- [Commits](zopefoundation/zope.interface@7.1.0...7.1.1)

---
updated-dependencies:
- dependency-name: zope-interface
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1 +1 @@
-zope.interface==7.1.0
+zope.interface==7.1.1